Help ATTW Rep, Please, I could you your wisdom.

Time to break-in this forum, how better than with a question. Here goes. I have an elderly father in BayShore, Long Island, New York. The land area code there is *631* and the zipcode is "11706* but he borders on the BayShore/Brentwood line. He lives west of 5th ave, north of north of Southern State Parkway and east of the Sagtiskos(spelling) pkwy. The question is, if in the near future I have to go there if he becomes ill, is that area well covered by ATTW? I live in Gainesville, Fl. and I haven't in New York 14 years. If I should have to go up there in a hurry, cell phone service is the last thing I need to think about. I will need a phone to work in both states. Do recommend TDMA,GSM,GPRS or something else? If this w...(continues)